88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2018, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software{} you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation{} either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY{} without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO{} if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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*/
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#include "vlr.h"
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#include <cassert>
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vlr* vlr::read(std::ifstream& in, bool extended){
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vlr* r1 = new vlr();
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in.read(reinterpret_cast<char*>(&r1->reserved),2);
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in.read(r1->userId,16);
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in.read(reinterpret_cast<char*>(&r1->recordId),2);
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if(extended){
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in.read(reinterpret_cast<char*>(&r1->recordLength),8);
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} else {
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uint16_t length;
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in.read(reinterpret_cast<char*>(&length),2);
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r1->recordLength = length;
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}
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in.read(r1->description,32);
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vlr* r2=0;
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// check all known VLRs
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if(!r2) r2 = LASF_Projection_2111::create(*r1,in);
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if(!r2) r2 = LASF_Projection_2112::create(*r1,in);
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if(!r2) r2 = LASF_Projection_34735::create(*r1,in);
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if(!r2) r2 = LASF_Projection_34736::create(*r1,in);
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if(!r2) r2 = LASF_Projection_34737::create(*r1,in);
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if(!r2) {
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// jump over data record
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in.seekg(r1->recordLength,std::ios::cur);
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//std::cout << "found unknown vlr" << std::endl;
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//r1->print(std::cout) << std::endl;
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}
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delete r1;
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if(in.good()){
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return r2;
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} else {
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delete r2;
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return 0;
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}
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}
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bool LASF_Projection_34735::read(std::ifstream& in){
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size_t r = 0;
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in.read(reinterpret_cast<char*>(&wKeyDirectoryVersion),2);
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r += 2;
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in.read(reinterpret_cast<char*>(&wKeyRevision),2);
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r += 2;
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in.read(reinterpret_cast<char*>(&wMinorRevision),2);
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r += 2;
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in.read(reinterpret_cast<char*>(&wNumberOfKeys),2);
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r += 2;
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for(size_t i=0;i<wNumberOfKeys;i++){
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sKeyEntry entry;
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entry.read(in, r);
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pKeys.push_back(entry);
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}
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assert(recordLength >= r);
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size_t ignore = recordLength - r;
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if(ignore > 0 ){
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in.seekg(ignore,std::ios::cur);
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}
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return in.good();
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}
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